<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
</head>
<body>
    
    <div id="app">
        <todo>
            <todo-title slot="todo-title" :title="title"></todo-title>
            <!-- v-on：（@）自定义事件名=“自定义事件(可以绑定vue内事件)” -->
            <!-- v-bind:（:）给组件绑定参数 -->
            <todo-items slot="todo-items" v-for="(item,index) in todoItems" :item="item" 
            :index="index" v-on:remove="removeItems(index)" :key="index"></todo-items>
        </todo>
    </div>
    
    <script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.js"></script>
    <script type="text/javascript">
        
        Vue.component("todo",{
            props: ['between001'],
            template: '<div>\
                <slot name="todo-title"></slot>\
                <ul>\
                    <slot name="todo-items"></slot>\
                </ul>\
            </div>'
        });
        Vue.component("todo-title",{
            props: ['title'],
            template: '<div>{{title}}</div>'
        });
        Vue.component("todo-items",{
            props: ['item','index'],
            //组件中事件只能调用本组件内方法
            template: '<li>{{index}}--{{item}}<button @click="remove">remove</button></li>',
            methods: {
                remove: function(index){
                    this.$emit('remove',index);//this.$emit自定义事件分发
                }
            }
        });

        var vm = new Vue({
            el:"#app",
            data: {
                title: "slot插槽",
                todoItems: ["AA","BB","CC"]
            },
            methods: {
                removeItems: function(index){
                    console.log("删除了"+this.todoItems[index]+"ok");
                    this.todoItems.splice(index,1);//根据下标删除下标后一个元素
                }
            }
        });
    </script>
</body>
</html>